Cassie, I don't have the resources, but I'm sure someone will soon. My best suggestion would be to talk to your vet about the anaethetic protocol they use. My vet was happy to explain what they were going to do with Ophelia and what the complication rate was. I had asked if they used Ketamine because I'd heard some real horror stories, and he explained that they use a small amount of Ketamine (because getting a mask on an awake kitty didn't usually work well
) and then use only gas anethetic for the operation. The gas allows for easier wake-up and recovery since the body removes it quicker than anything injected. He also reassured me with the complication rate he's personally experienced in his years of using that method (which I don't remember specifically, but I know it was very close to zero). Also, be sure to have the test run prior to anethetic. I don't know exactly what it is, but it's a blood test that can detect if there may be a reaction to the anethetic before they put kitty under, so that adjustments can be made to the protocol to keep her safe.
I appreciate that you are considering this for CJ. She will be a much happier kitty if you do spay her.